Examine source code of Documentation Reader

{
  "manifest_version": 3,
  "name": "Documentation Reader",
  "version": "1.0.0",
  "description": "Clean, distraction-free documentation reading with TOC, adjustable fonts, and themes",
  "browser_specific_settings": {
    "gecko": {
      "id": "doc-reader@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab",
    "storage",
    "scripting"
  ],
  "action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/toc-extractor.js",
        "content/reader.js"
      ],
      "css": [
        "content/reader.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "commands": {
    "toggle-reader-mode": {
      "suggested_key": {
        "default": "Ctrl+Shift+R"
      },
      "description": "Toggle reading mode"
    },
    "toggle-toc": {
      "suggested_key": {
        "default": "Ctrl+Shift+T"
      },
      "description": "Toggle table of contents"
    },
    "decrease-font": {
      "suggested_key": {
        "default": "Ctrl+Shift+Comma"
      },
      "description": "Decrease font size"
    },
    "increase-font": {
      "suggested_key": {
        "default": "Ctrl+Shift+Period"
      },
      "description": "Increase font size"
    },
    "toggle-theme": {
      "suggested_key": {
        "default": "Ctrl+Shift+D"
      },
      "description": "Toggle dark mode"
    }
  }
}